Clutch mechanism for power-hammers.



PATENT-ED MAY 9, 1905.

C. KELLER.

CLUTCH MEGHANISMFOR POWER HAMMERS.

APPLICATION FILED BBQ. 8, 1903.'

UNITED? STATES Patented May 9, 1905.

PATENT OFFICE.

CHARLES KELLER, OF BLOOMER, WISCONSIN, ASSIGNOR OF ONE-HALF TO J. E. KELLER, OF BLOOMER, WISCONSIN.

CL UTCH MECHANISM FOR POWER-HAMMERS.

SPECIFICATION forming part of Letters Patent No. 789,219, dated May 9, 1905.

Application filed December 8, 1903. Serial No. 184,294.

To all whmn it may concern.-

Be it known that 1, CHARLES KELLER, a citizen of the United States, residing at Bloomer, in the county of Chippewa and State of Wisconsin, have invented certain new and useful Improvements in Clutch Mechanism for Power-Hammers, of which the following is a specification.

This invention relates to an improved structure of clutch-operating mechanism adapted to be applied to power-hammers for punching, cutting, heading, or like uses.

The special type of hammer to which the invention relates is that class embodying the use of a walking-beam for operating the hammer, which walking-beam is oscillated by connection with a power-driven crank-shaft.

Special means embodied in the operating mechanism above mentioned are provided for throwing the hammer into operation and out of operation, a peculiar structure of treadle and intermediate shifting devices being employed for this purpose.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for effecting the result reference is to be had to the following description and accompanying drawings.

While the essential and characteristic features of the invention are susceptible of modification, still the preferred embodiment of the invention is illustrated in the accompanying drawings, in which Figure 1 is a perspective view of a powerhammer having my invention applied thereto. Fig. 2 is a detail view showing more clearly the shifting disk and themanner of throwing same into and out of engagement with the power-driven pulley. Fig. 3 is a detail perspective view of the members cooperating with the treadle to adjust the position of the friction-disk.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

The machine provided with my improved clutch mechanism comprises a base by which the same is secured rigidly to-its foundation, 5 from which base extends upwardly the curved standard 2. and the operative parts which are comprised in the detailed construction of the device are of any improved form, and therefore are not described.

A pitman 20 is used to operably connect the hammer with a crank-shaft 22, said pitman being secured to the crank-arm 21 of the crankshaft, the latter carrying the pulley 23, which constitutes one of the clutch parts and which is driven by means of applied power from any suitable source. The crank-shaft 22 is mounted in bearings carried by arms 24, extended upwardly from the base of the machine in rear of the curved standards 2 and secured to 5 the said base by means of bolts.

The treadle 25 is of loop form and is pivoted to the base, the actuating end of said treadle being connected to a pivoted arm 26, which arm is supported at one end by its pivotal connection with one of the parts at, and anotherarm, 26, has one end secured to the shift-lever 28, the other end cooperating with the arm 26 to attain a toggle-lever action. The shifting lever 28 is pivoted to a block 29, projected from the base, and the said lever is adapted for an oscillatory movement by movement of the pivoted arms 26 and 26. The shifting lever 28 is bifurcated or forked at its upper end to formspaced members 29, which members carry rollers 30 or like devices, which are received by an annular groove 31 upon the hub of. the friction-disk 32, which is the second clutch part cooperating with the pulley 23. The friction-disk is mounted upon 8 5 and keyed to the crank-shaft, as shown at 32, and movable toward and from the pulley 23. The pulley 23, to which the power is transmitted, is mounted loosely upon an extension of the hub of the friction-disk 32. The treadle 9 25 is normally held so as to hold the frictiondisk 32 out of engagement with the pulley by means of a spring 33, attached at one end at the curved standard 2 and at the other end to the treadle. The hub extension (designated 32") forms a journal for the pulley 23, and said pulley is prevented from displacement from the extension 32 by means of a cap 22,

secured to the adjacent end of the shaft 22 in any conventional manner.

Pressure upon the treadle 25 causingdown- Ward movement of the same throws the shifting lever into a position causing engagement of the friction-disk 32 With the side of the pulley. The friction-disk 32 being keyed to the shaft 22, the frictional contact of this member with the driving-pu1ley23 transmits motion to the shaft, and thereby actuates the hammer.

Having thus described the invention, What is claimed as new is- In a clutch mechanism for power-hammers and the like, the combination of supportingarms, acrank-shaftdisposed upon said supporting-arms, a friction-disk keyed to the crankshaft and provided With a hub extension, a

power-transmission pulley loosely mounted levers havingadjacentends pivotallyconnected, one of said toggle-levers being pivoted to one of the shaft-supporting arms, the other of the toggle-levers being secured to the shiftlever, a treadle, and a link connecting one end of the treadle to the toggle-levers at the point of pivotal connection of said toggle-levers.

In testimony whereofI afiix my signature in presence of two witnesses.

CHARLES KELLER. Witnesses:

EDWARD J. ELTER, FRIEDERroH Bnnrrz, 

